Cabbon-copy attachment f



P. E. PIERCE. CARBON COPY ATTACHMENT FOR TYPE WRITING MACHINES.

' APPLICATION FILED JULY 22, 1914.

1,149,855. Patented Aug; 10, I915.

W|+ ESS E v v Q INVE NTOR ATTORNEY 50 v titude will vary somewhat in PERCY E. PIERCE, or nn'rooim, PENNSYLVANIA.

CARBON-COPY ATTACHMENT-FOR TYPE-WRITING- MACHINES.

To. all who/hit may concern Be it known that I, PERCY E. PIERCE, a citizen of the United States, residing at Altoona, in the county of Blair and State of Pennsylvania, have invented a certain new and useful Improvement in Carbon- Copy Attachments for Type-\Vriting Machines, of which the following is a specification.

To those persons familiar with the operation and utilityv of typewriting machines the difficulty of obtaining a reasonably large the type bar when striking the number oflegible carbon copies at one writing is a well known fact. The ordinary platen, or rubber roll, which is used on practically all typewriting machines, oifers a more or less resilient or cushioning effect to paper, which in itselfis a proper condition, if only a few carbon copies of the original writing are desired, but, owing to the cushioning nature of the platen roller, the number of satlsfactory carbon copies obtainable at one writing is curtailed, and usually the last sheets or 1impresses will be dim and almost unreadab e.

I have found by actual experimenting and reduction to practice that much better results, in the quantity of legible carbon copies that can be obtained, will be had if the background, or surface immediately below and contacting with the last sheet of paper, were of a hard, unyieldable nature, in placeof the usual yieldable rubber roll.

My invention therefore aims to provide a very simple and inexpensive attachment for the ordinary platen roll, whereby a reasonably large number of carbon copies can be i obtained at one writing, said device being easily removed from its position against the roll.

constructively my invention involves the provision of a strip of hard, unyieldable, material, preferably of a metallic nature, to occupy a position relatively longitudinal with the platen roll, which it closely engages, but does not interfere with the rolls free rotary movement. Said strip will be removably fixed in its proper position directlyin the path of the type bar, which atdifferent makes of machines.

In the accompanying drawing I have shown one embodiment of my invention, but I do not limit myself to the exact detail formation disclosed herewith, reserving the Specification of Letters Eatent.

Patented Aug. 10, 1915.

Application filed July 22, 1914. Serial No. 852,337.

right to make necessary alterations and amendments thereto that will conform in all respects to the original idea and intention Y and which will be within the scope of the is a plan of an ordinary platen roller showing the relative position of my device as associated therewith; Fig. 2 is an elevation of the said roll and attachment; Fig. 3 is a cross sectional view showing relative position of the device with respect to the sheets.

of paper and type bar; Fig. 4 is a perspective view of the device detached from the roll, and Fig. 5 shows one of the terminal securing members.

The device in itself, designated by the nu- -meral 1, consists primarily of a singlestri of hard material, preferably of spring stee of adequate length, breadth, and thickness, which, in cross section, is made concave throughout its entire length, in, order to conform to the contour of. the platen 2, which it closely engages when properly positioned. Said strip is made slightly bowed from end to end in order that, when the terminals thereof are secured to the\ frame work of the carriage, the said strip will assume a uniform bearing and close alining contact with the said roll throughout its entire length. Various modified means can be employed for removably securing the said strip in operative position, said means depending on the style of machine to which it is applied. In the drawing I have disclosed one practical attaching means involving the arm members 3 secured at or adjacent to the terminal ends of the strip, or these arms may be an integral part of the strip, their upper free ends being bent at an approximate right angle to the main portion, to

afford an adequate attaching means, when taken in conjunction with a fixed L-shaped bar 4. This latter member, as shown in Fig. 5, is fastened to the frame of the carriage'of the machine adjacent to both housed ends of the platen roll, set screws 5' being utilized to remov ably connect the said arms 3 with the bars 4:.

The strip 1 is suspended in front of the platen roll, with which it contacts in the manner heretofore described, but does not necessarily act as a brake or prevent said roll from being rotated in order to feed the paper, nor does it interfere with the insertion and manipulation of said paper. Any

number of sheets, limited only by the maxi mum capacity of the paper feedmechanism,

can be presented in front of the strip 1, as

a resilient nature,such as rubber, but is of a sufiicient hardness to be unaffected by the blow imparted by the type bar. Said strip is intended to be more or less flexible in respect -to its bending qualities, for example of a nature kindred to spring steel or whale bone, but unyieldable in respect to its material composition.

What I claim as my invention is 1. In a typewriting machine the combination with the platen roll, of a strip of hard unyieldable material positioned in fixed longitudinal alinement against said roll, and in direct line 'with the striking point of each type bar, but not interfering with the rolls rotation, supporting bar members carried by the frame of the carriage of the machine, adjacent to the ends of the platen roll, and arms carried by the strip for removable locking engagement with the said bars.

2. In a typewriting machine the combination with'the platen roll, of a flexible stri of hard unyieldablc material, corres 0nd ing in cross section to the contour 0 said roll, supporting bar members carried by the frame of the carriage of the machine adjacent to the ends 'of the platen roll, and arms carried by the strip for removable locking engagement with the said bars to hold said striip in suspended attitude against the said r0 1.

3. In a typewriting machine the combination with the platen roll, of a flexible strip of hard unyieldable material positioned in fixed longitudinal alinement roll, but not interfering with the rolls rotation, and in direct line with the striking point of each type bar, sponding in cross section to the contour of the said roll, and having a normal predetermined bow from end to end thereof when detached from the roll; L-sha ed bar members carried by the frame of t e carriage of the machine adjacent tov the ends of the platen roll; and suspending members carried by the strip for removable locking engagement with the said bars.

- 4. In a typewriting machine the combination with the carriage and platen roll, of'a flexible strip of hard unyieldable material positioned in fixed longitudinal alinement against said roll, and in direct line with the striking point of each type bar, but not interfering with the rolls rotation; and suspending members carried by the strip for removable locking engagement with the frame of the carriage.

In testimony whereof I afiix my signature in the presence of two witnesses.

PERCY E. PIERCE.

Witnesses:

M. S. THoMrsoN, H. W. STEVENSON.

. against said said strip corre- 

